code: def supported_arch(self):
      return self._SUPPORTED_ARCH
  
imports: from dataclasses import dataclass
  from typing import Dict, Optional
  from nemo.collections.nlp.modules.common.transformer.bridge_encoders import BridgeEncoder
  from nemo.collections.nlp.modules.common.transformer.perceiver_encoders import PerceiverEncoder
  from nemo.collections.nlp.modules.common.transformer.reduction_encoders import PoolingEncoder
  from nemo.collections.nlp.modules.common.transformer.transformer import NeMoTransformerConfig, TransformerDecoderNM, TransformerEncoderNM
  from nemo.core.classes.common import typecheck
  from nemo.core.neural_types import MaskType, NeuralType
  from nemo.core.neural_types.elements import BoolType
label_desc: Use image node_id 3 for calling the TransformerBottleneckDecoderNM obj's underlying member method code with example usage: obj.supported_arch() and returns: self